Aunt Mary is crazy about shopping. She must be snapping up the bargains in the department store during such a sale,           ?
A．mustn’t she?B．isn’t sheC．needn’t sheD．doesn’t she
B
當must用來表示對現(xiàn)在的情況進行推測時，問句通常要根據(jù)must后面的動詞采用相應(yīng)的形式。Must后的動詞時be，主語she是單數(shù)第三人稱，故選B。
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